From Cppreference
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| #define FP_NORMAL /*implementation defined*/
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| (C++11 feature)
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The FP_NORMAL macro expands to an integer constant expression. It represents a type of floating point values and indicates that the value is normal, i.e. not an infinity, subnormal, not-a-number or zero.
[edit] See also
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| categorizes the given floating point value
(function)
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| indicates not-a-number (NaN)
(macro constant)
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| indicates infinite floating point value
(macro constant)
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| indicates subnormal number
(macro constant)
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| indicates zero
(macro constant)
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